![sas data merge sas data merge](https://sassavvy.com/resources/Pictures/final%20dataset.png)
In this case you are using IN Data Set Option.
Sas data merge how to#
In the example below, we show how to use the PROC APPEND procedure to combine two tables with the same structure. According to SYNTAX section of the merge Statement documentation, the data sets you are merging can have options. This difference makes the PROC APPEND procedure more efficient than the SET statement because the base data set isn’t stored in memory (necessarily). But it just stacks the two sets creating double the correct number of IDs. Observations are directly added to the base data set. DATA plete length studyid 8 MERGE hivgps2 rccsdata BY studyid round RUN I've tried to merge by studyid and round which are the only two variables shared across the data sets.
![sas data merge sas data merge](https://communities.sas.com/legacyfs/online/10013_Proc_report_not_merge_header_cells.png)
See the Output shown in the image below. You can assign any name you want, not just a.b.
Sas data merge code#
With this lines of code "a = x b = y ", we tell SAS to create two variables named a, b and put the same values as stored in variables x and y. Since the IN= option creates temporary variables, we need to create permanent variables so that we can see the flag in the dataset. libname myv8lib SAS-data-library data myv8lib.qtr1 / viewmyv8lib.qtr1 merge v8lrclother.clothes myv8lr. If the observation comes from the data set, then the flag returns 1. The data files are merged by date, and the value of the variable TOTAL is computed for each date. If the observation does not come from the dataset, then the flag returns 0. The IN= option tells SAS to create a flag that has either the value 0 or 1. Next Step : Use MERGE statement to merge the datasets by the variable ID.